A Novel Underwater Actuator Driven by Magnetization Repulsion/Attraction

This study has successfully designed and implemented a novel magnetic actuator. There are three merits of this magnetic actuator: (1) apply magnetic actuation force by magnetizing soft magnetic material, (2) both attractive and repulsive magnetic forces are available by changing the direction of magnetic field, and (3) the present magnetic actuator can be easily operated underwater. In applications, the test structure successfully demonstrates the repulsive force act as magnetic bearing to prevent contact of micro structures. The magnetization actuation mechanism which is suitable for underwater application is also demonstrated by micro gripper.